The purpose of this study is to investigate factors influencing the Thai millennial consumers’ intention to purchase clothing and accessories made from recycled plastic. The research relied on deductive reasoning through hypothesis testing; Statistical measurements were employed. Consequently, a descriptive quantitative research approach was utilized to conduct the study. The data were collected physically and virtually via a web-based survey. A total number of 393 responses from Thai millennial consumers who live in Bangkok and its vicinity were analyzed with the application of structural equation modeling. The result demonstrates that environmental concern, attitude, and perceived behavioral control have a significant relationship on purchase intention of green apparel, shoes, and accessories made from recycled plastic. Environmental concern also positively mediates the green attitude and has a stronger correlation toward attitude than purchase intention. The subjective norm, on the other hand, shows no significance.

El ángulo de fricción y la cohesión son parámetros de resistencia al corte establecidos por el modelo de Morh Coulomb, siendo estos necesarios para el diseño de estructuras geotécnicas utilizadas tanto en obras civiles como en obras mineras. Si durante la investigación geotécnica se concluye que las características de resistencia del material son menores a los requeridos, entonces es necesario realizar mejoras en terreno de fundación. Una de estas mejoras corresponde al uso de partículas PET, la misma que es mezclada con el suelo del terreno natural, obteniéndose un suelo con mejores características geotécnicas. El uso de las partículas PET como material de reforzamiento mecánico del suelo, nace de la necesidad técnica de obtener mejores características en el suelo y la búsqueda de reducir el impacto ambiental. La presente investigación busca encontrar el porcentaje óptimo de PET, que mejore el comportamiento geotécnico de un suelo gravoso arcilloso. Se preparó 5 probetas, donde se mezcló el suelo con porcentajes de 1%, 1.5%, 2%, 2.5% y 3 % de PET. Mediante el ensayo de corte directo se estimó la influencia del PET en la resistencia al corte del suelo. Los resultados obtenidos demuestran que el 2% de PET añadido a la grava arcillosa, aumenta la resistencia al corte en un 8.3% respecto al suelo sin refuerzo. / The angle of friction and cohesion are parameters of resistance to cutting that define the characteristics of the soil in civil works and buildings. If during the elaboration of a project, the soil does not comply with the necessary requirement, the way to improve or stabilize the soil to be used in the work is sought. The use of PET particles as a material for mechanical reinforcement of the soil, arises from the technical need to obtain better characteristics in the soil and the search to reduce the environmental impact. The present research seeks to find the optimal percentage of PET, which improves the geotechnical behavior of a clayey soil. Five test pieces were prepared, where the soil was mixed with percentages of 1%, 1.5%, 2%, 2.5% and 3% of PET. Through the direct cut test you will find the variation of the cut resistance generated by adding PET particles. The results obtained will be analyzed to understand the influence of the addition of recycled PET waste on the cut resistance of a clayey soil. / Tesis

This master’s thesis was conducted at Linköping University in collaboration with ToyotaMaterial Handling in Mjölby to explore potential applications of recycled plastic in forklifttrucks. The primary objective was to identify the most suitable recycled plastic to be usedon the top cover of the BT Levio LWI160, which served as the focal point of this project.This was done in order to address the research questions: "What types of mechanical- andindustrial design requirements are affected when using recycled plastic (of various composi-tions), and to which new requirements and changes will result from this?" and "What are themajor mechanical- and industrial design challenges, advantages & disadvantages of switchingto recycled plastic material, considering economic and sustainability factors." The study concludes that the requirements of the top cover will largely remain unchanged.The use of PP 20GF necessitates further testing for structural integrity and quality con-sistency in recycled material. This material’s harder, less ductile nature may require newimpact testing and recycling processes. Industrial design benefits include simplified colourchoices due to the material’s transparent base hue, although the dark brown colour of re-cycled plastics limits options. Ensuring consistency across batches, minimising costs, andaddressing surface defects and purity issues are critical challenges. Despite uncertainties,switching to recycled plastic can reduce CO2 emissions by up to 24% and attract environ-mentally conscious customers